The rift valleys of Africa [0.03%]
非洲大裂谷
G F S HILLS
G F S HILLS
G G SIMPSON
G G SIMPSON
R A M SCHMIDT
R A M SCHMIDT
Geology and geochemistry of paleosols developed on the Hekpoort Basalt, Pretoria Group, South Africa [0.03%]
南非普雷托利亚群赫克波尔特玄武岩上的古土壤的地质和地球化学性质
R Rye,H D Holland
R Rye
The Hekpoort paleosols comprise a regional paleoweathering horizon developed on 2.224 +/- 0.021 Ga basaltic andesite lavas at the top of the Hekpoort Formation of the Pretoria Group, Transvaal Supergroup, South Africa. In five separate prof...
R Rye,H D Holland
R Rye
A number of investigators have used chemical profiles of paleosols to reconstruct the evolution of atmospheric oxygen levels during the course of Earth history (Holland, 1984, 1994; Kirkham and Roscoe, 1993; Ohmoto, 1996). Over the past dec...
A hybrid model of the CO2 geochemical cycle and its application to large impact events [0.03%]
CO2地球化学循环的混合模型及其在大规模撞击事件中的应用研究
J F Kasting,S M Richardson,J B Pollack et al.
J F Kasting et al.
A hybrid model of the carbonate-silicate geochemical cycle is presented which is capable of calculating the partitioning of carbon dioxide between the atmosphere, ocean, and sedimentary rocks. The ocean is subdivided into a shallow, mixed l...